Improvement in springs for vehicles



\ possessing torsional elasticity.

l UNITED STATES PATENT GEEIGE. L

JACOB MAYER, OF ELMER, NEW YORK.

IMPROVEMENT IN SPRINGS FOR VEHICLES.

Specification forming part of Letters Patent No. 139,801, dated June 10, 1873 application led April 21, 1873.

i and torsional spring composed of two similar parts secured respectively to the axle-tree i, and body ofthe vehicle.

In the accompanying drawing, Figure 1 is a` plan view of a vehicle provided with my improved springs. Fig. 2 is a side elevation, and Fig. 3 a perspective view, of one of the springs.

Like letters of reference designate likeV l parts in each of the ligures.

A represents the cross or bearing pieces attached to the under side of the body or box of a vehicle, and B B the front and rear axletrees thereof. C represents my combined elliptic and torsional spring, composed of an upper and lower half, each constructed of a single steel rod, tube, or other material c cA represent the two torsion-arms of each half of' the spring O, formedbybending the central portion ot' the rod composing the same into an elongated loop, as clearly shown in Figs. l and 3. d d represent the t .vo yielding or elliptic arms of each halt' of the spring O, extending from the outer ends of the torsion-arms c c outwardly in an inclined direction. Each halt of `the spring U is secured in place by a staple, e, lirmly clamping the inner end of the loop or junction of the arms c c, and two bearings, ff, holding the outer ends of the arms cc against lateral displacement, but allowing of their turning therein. The ends of the arms d d of both halves of each spring are united together by bolts g, or 'other suitable means, as usual in elliptic springs. When a single spring is employedwith each axle the torsionarms c c ofthe lower halves are secured to the reach E of the vehicle, as shown atthe front axle Bin Fig. l, while when two springs are employed they are secured to the axle as shown at the rear axle B in `the same iigure.`

4Then pressure is applied yto the spring C` the elasticity of the ellipticarms dd and tor sion-arms c c is called into action one after the other, the formerattening out to a certain degree, whereby the latter aretwisted more or less, according to the intensity of the strain. f In this manner the -torsional strain is trans` i mitted more gradually to the arms c c than in ordinary torsional springs, which are only provided with short unyielding pressure-arms,V t Y transmitting the shock directly and with full force to the torsion-arms. In my improved spring the elliptic arms d d allow the body ot' the vehicle a greater vertical movement with, i

springs, and quite as durable and eiiicient in l its operation.

I'claim as my invention- The combined elliptic and torsional spring C, composed oi' two halves, each consisting of two torsion-arms, c c, and elliptic arms d d,

constructed to operate substantially as here-` t inbefore set forth. i

JACOB MAYER. Witnesses:

J oHN J. BONNEE, EDWARD WILHELM. 

